GDI+] 이미지 회전!

 

회전!! 뱅글 뱅글..

 

 Resource.R 은 회전 될 이미지

 

 

 public partial class Form1 : Form
    {
        float angle = 0f;
        Timer tm = new Timer();
        public Form1()
        {
            InitializeComponent();
            tm.Interval = 500;
            tm.Tick += new EventHandler(tm_Tick);
            tm.Start();
        }
        void tm_Tick(object sender, EventArgs e)
        {
            angle += 10;
            Invalidate();
        }
        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            e.Graphics.DrawImage( rotateImage( Resources.r , angle ), 100f, 100f);
        }
        /// <summary>
        /// 튜토리얼 :  http://www.switchonthecode.com/tutorials/csharp-tutorial-image-editing-rotate
        /// </summary>
        /// <param name="b"></param>
        /// <param name="angle"></param>
        /// <returns></returns>
        private Bitmap rotateImage(Bitmap b, float angle)
        {
            //create a new empty bitmap to hold rotated image
            Bitmap returnBitmap = new Bitmap(b.Width, b.Height);
            //make a graphics object from the empty bitmap
            Graphics g = Graphics.FromImage(returnBitmap);
            //move rotation point to center of image
            g.TranslateTransform((float)b.Width / 2, (float)b.Height / 2);
            //rotate
            g.RotateTransform(angle);
            //move image back
            g.TranslateTransform(-(float)b.Width / 2, -(float)b.Height / 2);
            //draw passed in image onto graphics object
            g.DrawImage(b, new Point(0, 0));
            return returnBitmap;
        }
    }